Narrative:

Small aircraft X reported to me 4 northwest of field. I cleared him to land runway 6. On landing I discovered no gear. An alert was called immediately. All other inbound aircraft were broken off and switched to radar.

Google
 

Original NASA ASRS Text

Title: SMA LANDS GEAR UP. CTLR CALLS EMERGENCY EQUIPMENT.

Narrative: SMA X RPTED TO ME 4 NW OF FIELD. I CLRED HIM TO LAND RWY 6. ON LNDG I DISCOVERED NO GEAR. AN ALERT WAS CALLED IMMEDIATELY. ALL OTHER INBND ACFT WERE BROKEN OFF AND SWITCHED TO RADAR.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.